AirHint found the following cheapest return flights from Grenoble (GNB) to London (LTN) in December 2025 (see full year).

Return flights

13 Dec - 03 Jan	Ryanair	direct
27 Dec - 17 Jan	Wizz Air UK	direct
27 Dec - 03 Jan	Wizz Air UK	direct
13 Dec - 20 Dec	Ryanair	direct
27 Dec - 04 Jan	easyJet	direct
27 Dec - 10 Jan	Wizz Air UK	direct
20 Dec - 03 Jan	Ryanair	direct
20 Dec - 10 Jan	Ryanair	direct
13 Dec - 27 Dec	Ryanair	direct
20 Dec - 27 Dec	Ryanair	direct
21 Dec - 26 Dec	easyJet

Also check the deals for one-way flights from Grenoble to London in December.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from Grenoble to London in December from 63€

Return flights